Rolf Kühn is associated with the Swiss Orchid Foundation at the University of Basel, Switzerland. He has spent more than forty years exploring for and photographing orchids in their native habitats in Europe and the Mediterranean. Henrik Ærenlund Pedersen is emeritus at the Natural History Museum of Denmark, where he was previously associate professor and curator. He runs Select Nature, a consultancy firm also offering lectures, courses, and guided tours. He is the author or coauthor of several books including Ophrys: The Bee Orchids of Europe, also published by Kew. Phillip Cribb is a leading specialist on the taxonomy and conservation of orchids and a member of the RHS Orchid Committee. He was deputy keeper of the herbarium and curator of the orchid herbarium at the Royal Botanic Gardens, Kew, until his retirement in 2006. He is the author or coauthor of many books including The Orchid, Guide to the Flowers of Western China 2nd Edition, Field Guide to the Orchids of Madagascar, and Growing Hardy Orchids.